Jeffry R. Keyes Sells Quantum-Si Inc. Shares to Cover Tax Obligations

Jeffry R. Keyes, an officer of Quantum-Si Inc., sold 7,746 shares of Class A Common Stock to cover tax withholding obligations related to the vesting of restricted stock units. The sale, which occurred on September 22, 2025, was mandated by the company's policy to satisfy tax obligations through a sell-to-cover transaction and was not a discretionary trade by Keyes. The shares were sold at an aggregate market value of $12,847.41. Additionally, Keyes sold 3,873 shares on September 22, 2025, for $6,515.87 and another 3,873 shares on September 23, 2025, for $6,331.54. These transactions were facilitated by Morgan Stanley Smith Barney LLC.